// Copyright (c) 2010 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CONTENT_RENDERER_PEPPER_PLUGIN_OBJECT_H_
#define CONTENT_RENDERER_PEPPER_PLUGIN_OBJECT_H_

#include <string>

#include "base/macros.h"
#include "base/memory/weak_ptr.h"
#include "gin/interceptor.h"
#include "gin/wrappable.h"
#include "ppapi/c/pp_var.h"
#include "v8/include/v8-util.h"

struct PPP_Class_Deprecated;

namespace gin {
class Arguments;
} // namespace gin

namespace content {

class PepperPluginInstanceImpl;

// A PluginObject is a JS-accessible object implemented by the plugin.
//
// In contrast, a var of type PP_VARTYPE_OBJECT is a reference to a JS object,
// which might be implemented by the plugin (here) or by the JS engine.
class PluginObject : public gin::Wrappable<PluginObject>,
                     public gin::NamedPropertyInterceptor {
public:
    static gin::WrapperInfo kWrapperInfo;

    ~PluginObject() override;

    // Returns the PluginObject which is contained in the given v8 object, or NULL
    // if the object isn't backed by a PluginObject.
    static PluginObject* FromV8Object(v8::Isolate* isolate,
        v8::Local<v8::Object> v8_object);

    // Allocates a new PluginObject and returns it as a PP_Var with a
    // refcount of 1.
    static PP_Var Create(PepperPluginInstanceImpl* instance,
        const PPP_Class_Deprecated* ppp_class,
        void* ppp_class_data);

    // gin::NamedPropertyInterceptor
    v8::Local<v8::Value> GetNamedProperty(v8::Isolate* isolate,
        const std::string& property) override;
    bool SetNamedProperty(v8::Isolate* isolate,
        const std::string& property,
        v8::Local<v8::Value> value) override;
    std::vector<std::string> EnumerateNamedProperties(
        v8::Isolate* isolate) override;

    const PPP_Class_Deprecated* ppp_class() { return ppp_class_; }
    void* ppp_class_data() { return ppp_class_data_; }

    // Called when the instance is destroyed.
    void InstanceDeleted();

private:
    PluginObject(PepperPluginInstanceImpl* instance,
        const PPP_Class_Deprecated* ppp_class,
        void* ppp_class_data);

    // gin::Wrappable
    gin::ObjectTemplateBuilder GetObjectTemplateBuilder(
        v8::Isolate* isolate) override;

    // Helper method to get named properties.
    v8::Local<v8::Value> GetPropertyOrMethod(v8::Isolate* isolate,
        PP_Var identifier_var);

    void Call(const std::string& identifier, gin::Arguments* args);

    v8::Local<v8::FunctionTemplate> GetFunctionTemplate(v8::Isolate* isolate,
        const std::string& name);

    PepperPluginInstanceImpl* instance_;

    const PPP_Class_Deprecated* ppp_class_;
    void* ppp_class_data_;

    v8::StdGlobalValueMap<std::string, v8::FunctionTemplate> template_cache_;

    base::WeakPtrFactory<PluginObject> weak_factory_;

    DISALLOW_COPY_AND_ASSIGN(PluginObject);
};

} // namespace content

#endif // CONTENT_RENDERER_PEPPER_PLUGIN_OBJECT_H_
